//package com.ruoyi.gateway.filter;
//
//import java.util.Collections;
//import java.util.List;
//
//import org.springframework.cloud.gateway.filter.GatewayFilter;
//import org.springframework.cloud.gateway.filter.GatewayFilterChain;
//import org.springframework.cloud.gateway.filter.OrderedGatewayFilter;
//import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
//import org.springframework.core.io.buffer.DataBuffer;
//import org.springframework.core.io.buffer.DataBufferFactory;
//import org.springframework.core.io.buffer.DataBufferUtils;
//import org.springframework.http.HttpMethod;
//import org.springframework.http.server.reactive.ServerHttpRequestDecorator;
//import org.springframework.stereotype.Component;
//import org.springframework.web.server.ServerWebExchange;
//import reactor.core.publisher.Flux;
//import reactor.core.publisher.Mono;
//
///**
// * 获取body请求数据（解决流不能重复读取问题）
// *
// * @author ruoyi
// */
//@Component
//public class CacheRequestFilter extends AbstractGatewayFilterFactory<CacheRequestFilter.Config> {
//    public CacheRequestFilter() {
//        super(Config.class);
//    }
//
//    @Override
//    public String name() {
//        return "CacheRequestFilter";
//    }
//
//    @Override
//    public GatewayFilter apply(Config config) {
//        CacheRequestGatewayFilter cacheRequestGatewayFilter = new CacheRequestGatewayFilter();
//        Integer order = config.getOrder();
//        if (order == null) {
//            return cacheRequestGatewayFilter;
//        }
//        return new OrderedGatewayFilter(cacheRequestGatewayFilter, order);
//    }
//
//    public static class CacheRequestGatewayFilter implements GatewayFilter {
//        @Override
//        public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//            // GET DELETE 不过滤
//            HttpMethod method = exchange.getRequest().getMethod();
//            if (method == null || method.matches("GET") || method.matches("DELETE")) {
//                return chain.filter(exchange);
//            }
//            return DataBufferUtils.join(exchange.getRequest().getBody()).map(dataBuffer -> {
//                byte[] bytes = new byte[dataBuffer.readableByteCount()];
//                dataBuffer.read(bytes);
//                DataBufferUtils.release(dataBuffer);
//                return bytes;
//            }).defaultIfEmpty(new byte[0]).flatMap(bytes -> {
//                DataBufferFactory dataBufferFactory = exchange.getResponse().bufferFactory();
//                ServerHttpRequestDecorator decorator = new ServerHttpRequestDecorator(exchange.getRequest()) {
//                    @Override
//                    public Flux<DataBuffer> getBody() {
//                        if (bytes.length > 0) {
//                            return Flux.just(dataBufferFactory.wrap(bytes));
//                        }
//                        return Flux.empty();
//                    }
//                };
//                return chain.filter(exchange.mutate().request(decorator).build());
//            });
//        }
//    }
//
//    @Override
//    public List<String> shortcutFieldOrder() {
//        return Collections.singletonList("order");
//    }
//
//    static class Config {
//        private Integer order;
//
//        public Integer getOrder() {
//            return order;
//        }
//
//        public void setOrder(Integer order) {
//            this.order = order;
//        }
//    }
//}